US3677294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic flush tank
Assignee: WATER CONTROL PRODUCTS Inc A CORP OF
•
Filing: 1971-04-12
•
Granted: 1972-07-18
•
Expires: 1991-04-12
Abstract
Abstract A hydraulic assembly for filling and rapidly discharging a liquid from a hermetically sealed tank. The assembly includes a flush tank having a cylindrical sleeve extending vertically therethrough and a tubular axially disposed air vent within the sleeve. A valve means, slidably disposed within the sleeve on the tubular air vent adjacent the lower end thereof, is closed by the normal water line pressure, entering through the top of the sleeve, to hermetically seal the flush tank and the chamber within the sleeve, permitting the pressure therein to build until it balances the water line pressure. Manually operated valve means are provided at the top of the sleeve to open the pressurized chamber within the sleeve to the air vent causing the rapid discharge through the air vent of part of the water within the sleeve chamber, which, because of the pressure differential thus created, opens the valve at the bottom of the sleeve causing a rapid discharge of the pressurized water from the tank.
Inventors
- 👤 James W Gibbs
- 👤 John L Gibbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:32
CPC Classifications
E; E03; E03D; E03D3/00; E03D3/02; E03D3/04; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86187; Y10T137/86196
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
306 words
A hydraulic flush tank assembly comprising, A. a main tank providing, 1. a pressure sealable primary liquid storage chamber; B. a sleeve means fixed to and extending vertically through said tank providing, 1. a secondary liquid storage chamber, 2. an open lower end comprising a discharge outlet, 3. a valve seat above and adjacent to said discharge outlet, 4. apertures, above and adjacent to said valve seat, providing communication between said primary and secondary storage chambers; C. an air vent tube, extending axially through said sleeve means, opening to the atmosphere above and below said tank; D. means to enclose the top of said secondary liquid storage chamber; E. a pressure actuated piston valve means slidably disposed in said secondary liquid storage chamber which is actuated by downward pressures to a closed position on said valve seat to hermetically seal both of said storage chambers, and to an open position by upward pressures to open said primary storage chamber through said apertures to said discharge outlet; said piston valve providing, 1. a by-pass valve operating between said secondary liquid storage chamber and said apertures; F. inlet conduit means from a pressurized source to direct a liquid downwardly through said secondary storage chamber to close said piston valve and to fill said hermetically sealed primary and secondary storage chambers with the liquid until a state of pressure equilibrium exists relative to the source, G. manually operated valve means which is operable to open said secondary liquid storage chamber into said air vent tube to destroy the state of pressure equilibrium causing said by-pass valve to close and said pressure actuated piston valve means to open in response to upward pressure whereby said primary liquid storage tank is opened to the atmosphere through said apertures and discharge outlet, permitting the pressurized liquid therein to be very rapidly discharged.
Claim 2
Dependent Claim
306 words
A hydraulic flush tank assembly comprising, A. a main tank providing, 1. a pressure sealable primary liquid storage chamber; B. a sleeve means fixed to and extending vertically through said tank providing, 1. a secondary liquid storage chamber, 2. an open lower end comprising a discharge outlet, 3. a valve seat above and adjacent to said discharge outlet, 4. apertures, above and adjacent to said valve seat, providing communication between said primary and secondary storage chambers; C. an air vent tube, extending axially through said sleeve means, opening to the atmosphere above and below said tank; D. means to enclose the top of said secondary liquid storage chamber; E. a pressure actuated piston valve means slidably disposed in said secondary liquid storage chamber which is actuated by downward pressures to a closed position on said valve seat to hermetically seal both of said storage chambers, and to an open position by upward pressures to open said primary storage chamber through said apertures to said discharge outlet; said piston valve providing, 1. a by-pass valve operating between said secondary liquid storage chamber and said apertures; F. inlet conduit means from a pressurized source to direct a liquid downwardly through said secondary storage chamber to close said piston valve and to fill said hermetically sealed primary and secondary storage chambers with the liquid until a state of pressure equilibrium exists relative to the source, G. manually operated valve means which is operable to open said secondary liquid storage chamber into said air vent tube to destroy the state of pressure equilibrium causing said by-pass valve to close and said pressure actuated piston valve means to open in response to upward pressure whereby said primary liquid storage tank is opened to the atmosphere through said apertures and discharge outlet, permitting the pressurized liquid therein to be very rapidly discharged.
Claim 3
Dependent Claim
8 words
an open lower end comprising a discharge outlet,
Claim 4
Dependent Claim
8 words
an open lower end comprising a discharge outlet,
Claim 5
Dependent Claim
47 words
A hydraulic flush tank assembly as defined in claim 1 in which said means to enclose comprises the valve body of said manually operated valve means including a connection means for said inlet conduit and a port means from said inlet conduit to said secondary liquid chamber.
Claim 6
Dependent Claim
18 words
A hydraulic flush tank assembly as defined in claim 2 including a check valve in said inlet conduit.
Claim 7
Dependent Claim
10 words
a valve seat above and adjacent to said discharge outlet,
Claim 8
Dependent Claim
10 words
a valve seat above and adjacent to said discharge outlet,
Claim 9
Dependent Claim
111 words
apertures, above and adjacent to said valve seat, providing communication between said primary and secondary storage chambers; C. an air vent tube, extending axially through said sleeve means, opening to the atmosphere above and below said tank; D. means to enclose the top of said secondary liquid storage chamber; E. a pressure actuated piston valve means slidably disposed in said secondary liquid storage chamber which is actuated by downward pressures to a closed position on said valve seat to hermetically seal both of said storage chambers, and to an open position by upward pressures to open said primary storage chamber through said apertures to said discharge outlet; said piston valve providing,
Claim 10
Dependent Claim
111 words
apertures, above and adjacent to said valve seat, providing communication between said primary and secondary storage chambers; C. an air vent tube, extending axially through said sleeve means, opening to the atmosphere above and below said tank; D. means to enclose the top of said secondary liquid storage chamber; E. a pressure actuated piston valve means slidably disposed in said secondary liquid storage chamber which is actuated by downward pressures to a closed position on said valve seat to hermetically seal both of said storage chambers, and to an open position by upward pressures to open said primary storage chamber through said apertures to said discharge outlet; said piston valve providing,
Claim 11
Dependent Claim
63 words
A hydraulic flush tank assembly as defined in claim 2 in which said manually operated valve means comprises a slide valve movable between an extended position and a depressed position and providing port means which are closed when said slide valve is in said extended position and in open communication between said secondary storage chamber and air vent tube in said depressed position.
Claim 12
Dependent Claim
60 words
A hydraulic flush tank assembly as defined in claim 4 in which said slide valve includes an inner end surface and said connection means are positioned relative to said iNner end surface whereby said pressurized liquid is directed thereagainst to move said slide valve to and maintain it in its extended position except when said slide valve is manually depressed.
Claim 13
Dependent Claim
52 words
A hydraulic flush tank assembly as defined in claim 5 including a compression spring to partially counterbalance the pressure exerted on said inner end surface whereby said port means are maintained in a partially opened condition until a predetermined degree of pressurization has been attained in said primary and secondary storage chambers.
Claim 14
Dependent Claim
18 words
A hydraulic flush tank assembly as defined in claim 6 including compression adjustment means for said compression spring.
Claim 15
Dependent Claim
74 words
A hydraulic flush tank assembly as defined in claim 7 in which said slide valve includes an enlarged annular flange and said compression adjustment means comprises a nut threaded into said valve body, said compression spring being circumposed about said slide valve between said enlarged annular flange and said nut, said nut being provided with a central through bore and said slide valve having a portion extending outwardly through said bore for manual manipulation.
Claim 16
Dependent Claim
34 words
A hydraulic flush tank assembly as defined in claim 8 in which abutment means are provided in said valve housing to cooperate with said enlarged annular flange to establish said extended and depressed positions.
Claim 17
Dependent Claim
81 words
A hydraulic flush tank assembly as defined in claim 1 in which said pressure actuated piston valve includes, an elastomer lower portion for sealing engagement with said valve seat, an enlarged head portion spaced upwardly therefrom, a neck portion connecting said lower and head portions and a central axially extending bore, said enlarged head portion and bore being sized to provide sliding movement of said piston valve within said secondary liquid storage chamber in telescopic relation to said air vent tube.
Claim 18
Dependent Claim
30 words
A hydraulic flush tank assembly as defined in claim 10 including seal means between said piston valve, and the wall of said secondary liquid storage chamber and air vent tube.
Claim 19
Dependent Claim
29 words
A hydraulic flush tank assembly as defined in claim 10 in which said by-pass valve extends through said enlarged head portion between said secondary and primary liquid storage chambers.
Claim 20
Dependent Claim
31 words
A hydraulic flush tank assembly as defined in claim 1 including a check valve at the upper end of said air vent tube to prevent an upward discharge of liquid therefrom.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |